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Random pictures
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano
Stratovolcano 2797 m / 9,176 ft
North Island, New Zealand, -39.28°S / 175.57°E
Current status: normal or dormant (1 out of 5)
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Ruapehu volcano eruptions:

Typical eruption style:
Mildly explosive, formation of lahars
Last earthquakes nearby
Latest satellite images
 

News and activity reports about Ruapehu volcano:

Ruapehu volcano (New Zealand): increased crater lake temerature and seismic activity

Wednesday Apr 17, 2019 22:10 PM | BY: LEO

The Ruapehu crater lake during winter. (image: GNS Science)
The Ruapehu crater lake during winter. (image: GNS Science)
Another phase of increased crater lake temperatures has been recorded at the Te Wai ā-moe (Crater Lake) Mt Ruapehu in combination with moderate levels of volcanic tremor.

For the last 10 years temperatures of the summit crater lake have cycled between ~15 and 45°C over 12 month periods. Since September 2018 lake temperatures have remained at ~30°C. Over the past two weeks the temperatures have risen again at a rate of 0.5°C per day, to 42°C on April 9. Consistant with previous periods heating cycles a moderate volcanic tremor has accompanied this rise in temperature.

Previously, eruptions have been observed to occur more frequently when the lake temperature exceed 45°C, although this was not the case in 2016 when a temperature of 46°C was observed with no eruption.

Both the Volcanic Alert Level (level 1) and Aviation Code (Green) remain unchanged.
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Links / Sources:
Previous news
Tremor spectrum and amplitude at Ruapehu volcano (GeoNet)
Monday, Nov 07, 2016
Volcanic tremor (which is normally present at the volcano) has increased a notch since mid October, but not enough to trigger a raise in alert status of the volcano (which remains at level 1). New Zealand's GNS Science issued a note but does not expect the volcano to erupt soon. ... [more]
Ruapehu's crater lake in August 2016 (image: Geonet)
Friday, Sep 09, 2016
After reaching record-low temperatures in August, the volcano's closely-monitored crater lake has started to heat up very quickly since 2 September, Geonet reported. ... [more]
Friday, May 20, 2016
On 17 May GeoNet reported that the lake temperature of Ruapehu's summit Crater Lake had decreased from a high of 46 degrees Celsius to 39 degrees, with some of the decrease attributed to rain and snowfall. ... [more]
Friday, May 13, 2016
The alert level of the volcano was raised by a notch from 1 to Level 2 (moderate to heightened unrest) last Wednesday, Geonet informed in a special note. ... [more]
Seismic recording at Ruapehu volcano today (Far West station / Geonet)
Saturday, Apr 30, 2016
An earthquake swarm has been occurring at the volcano since 26 April. ... [more]

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